Cobalt(II) bromide is a chemical compound with the formula CoBr2. It consists of cobalt in the +2 oxidation state and bromide ions. This compound typically appears as a blue or purple solid and is soluble in water, forming a cobalt(II) bromide solution. Cobalt(II) bromide is used in various applications, including as a catalyst in chemical reactions and in the preparation of other cobalt compounds. It is also utilized in the production of pigments and in certain types of batteries, contributing to the field of materials science and chemistry.